Centrifugal machine



June 18,1929. v c. V BOUILLON 17179753.

CENTRIFUGAL MACHINE Filed July 14, 1928' 2 Sheets-Sheet 1 /2 I; A7 FIG]- 7 A 8 --4 4 4' I :50 g r W (Mu June 18, 1929. c, v, aoul 1,7W.?53

CENTRIFUGAL MACHINE,

Filed July 14, 1928 2 Sheets-Sheet 2 Patented June 18, 1929.

- CHARLES- VICTOR IBOUILLON, OF PARIS, FRANCE.

CENTBIFUGAL MACHINE.

Application filed July 14, 1928, Serial No. 292,630, and in France June 6, 1828.

Centrifuge apparatuses are known to the art which are employed for the separation of solid materials in'suspension in ii uids and having the form of acylinder tted on its periphery with a series of juxtaposed receptacles of pyramidal or conical form, at the apexes of which the dirty liquid is evacuated through calibrated orifices in a continuous manner due to centrifugal force, while the clarified liquid is evacuated, likewise in a continuous manner, in the vicinity of the apex of the apparatus.

Such apparatuses, however, present disadvantages resulting chiefly from the rather high speeds of rotation given to the apparatus. As a matter of fact, due to these speeds of rotation, the evacuation orifices p aced at the apexes of pyramidal receptacles must be of very small dimensions, very frequently less than 1 mm. in diameter, in such wise as to limit on the one hand the volume which said orifices give out, and on the other hand, the energy absorbed by the evacuation of said liquids whose velocity is ve high. Obviously the use of orifices of su i small section necessarily causes obstruction thereof.

Y The object of my invention reside in overcoming these disadvantages by means of an arrangement in which the apexes of the pyramidal or conical receptacles are provided with evacuation channels in the form of small diverging cylindrical or conical blast nozzles whose axes are disposed substantially in the direction of centrifugal force, which channels are provided with a mechanical cleaning device consisting preferably of a blade or analogous expedient to which is given a movement of rotation and which passes at each revolution over the evacuation orifice. Said blade is adapted to receive movement of rotation from a radially disposed rod into which it is fitted and is adapted to turn with light friction in a conduit provided at the base of the centrifugal bowl. Said rod in turn receives a movement of rotation either from an independent motor or from the shaft of the decanting apparatus by means of any suitable speed reducing device. The thickness of the blade being suitably chosen and the speed of rotation thereof being suitably regulated by means of properly designed gear ratios, the evacuation orifices, piercing a plug and eccentrically disposed with respect to the axis of the blade, will thus be periodically cleaned. The shutter blade is preferably fitted to slide in the radial rod so that it is thrust b centrifugal force aga1nst the plug in which is pierced the evacuation orifice.

In the accompanying drawing I have represented, by way of example, one form of construction of the apparatus conforming to my invention.

In the drawing-- Fig. 1 is an axial section through a vertical type of decanting apparatus;

Fig. 2 is a horizontal section on the line AA of Fig. 1;

,Fig. 3 is a fragmentary sectional detail of the sediment evacuating apparatus; and

Fig. 4 is a sectional detail on the line B-B of Fig. 3..

Adverting to Fig. 1, .the apparatus comprises a main frame casting 1 sq porting and guiding the group of movab e parts fixed to a central vertical arbor 2 resting on a lower step bearing 3 and guided by a middle support 4. Said arbor is preferably dr ven by a belt passing over a pulley 6 but the said arbor might obviously be driven directly by an electric motor coupled directly thereto or other suitable means.

The bowl of the decanting a paratus 7 is fixed to the central arbor 2 and has a form of a truncated cone the larger base of which is constituted by acircular horizontal wall 8. The tapered part of the bowl is formed of two parts assembled by a joint 9 for introducing a series of truncated conical olarizing discs 10 destined to facilitate ecantation in a manner well known in the art.

The upper part of the central arbor 2 above the foot of the bowl is hollow and serves for introducing the li uid to be treated, which liquid is lead in t rough the upper extremity 12 of the central arbor from whence it is distributed throu h tions 13 provided in said arbor bet polarizing discs 10'.

The bowl of the decanting apparatus consists, in a manner well known in the art, of a series of pyramidal forms 16 (Fig. 2) which are equally spaced and form empty spaces of identical form between as shown at 17 which are also of pyramidal form and whose apexes 18 are situated on the largest diameter of the bowl.

The solid particles are evacuated in the pyramidal chambers 17 as hereinbefore indicated. FQrreguIating the rate of evacuation ween the perfora- 1 and more in detail in Figs. 3 an 4.

begins at a socket 39 loosely mounted on upon wh of sediment and preventing closing of the outlet orifices provided at the apex of each of the pyramidal chambers, I have provided a device represented conventionall in Fig.

Said device comprises a circular rod 34 adapted to turn with li ht friction in a horizontal radially dispose conduit 35 provided on the bottom of bowl 8. The conduit 35 slight distance from each of the apexes 18 of the pyramidal chambers 17. As shown in Fig. 1, the rod 34 receives movement of rotation from the main arbor 2. For this purpose, at its extremity situated at the center of the ap aratus, the rod 34 traverses a sup ort 36 an terminates in .a bevelled pinion 3 which imparts a movement of rotation thereto from a bevelled gear. Said bevelled gear is inte ral with a the arbor 2. ich it is supported through the medium of a ball race 40 bearing on a flange The socket 39 is likewise integral with a toothed wheel 42 which is set in motion by a corresponding toothed wheel 43 keyed to en auxiliary arbor 44 parallel to the main arbor 2.

Said auxiliary arbor carries at its lower end a gear 45 which receives movement from a toothed wheel 46 keyed on the main arbor. The auxiliary arbor 44 and the toothed wheels 43 and 45 are preferably supported b the main frame 1.

By suita ly determining the ratios of gears 42, 43, 45and 46 forming a gear train any fixed speed that may be desired may be given to the bevelled gear 38 so that the an ular speed of the six rods 34 may be ad usted as desired.

ach rod 34, at its extremity situated at the peri hery of the cone, terminates in a device il ustrated on a larger scale in Figs. 3 and 4. The circular .rod 34 carries at its extremity an interior recess of s uare or rectan ular section, into which sli es with light riction a uare rod 47 provided at its extremity with a lade 48 of rectangular section. The outer face of said blade is adapted to bear on the inner surface 49 of a plu 50 screwed into the periphery of the bow and whose axis coincides with that of the rod 34.

For the purpose of easily replacin the inner face 49 of plug 50 subject to ru bin by blade 48 in case of wearin thereof, preferably provide a remova le member therein in the form of a bar 51 fitted to the plug by means of a screw 52.

In order to assure exact centering exactly the blade 48, said blade carries on its outer face a circular orifice 53 in which engages a pin 54 integral with the plu or movable piece 51 and is disposed along tie axis of the p ug.

At a suitable distance from its axis .said

force either of cylindrical form of small diameter as represented in Fig. 3 or in the form of a diverging cone.

The device above described operates in the following manner:

When the particles of solid matter have once been separated and-the liquid clarified they accumulate at the apex 18 of pyramidal chambers 17 in the form of sediment and are solicited by centrifugal force and flow through the orifices 55 and 56 traversing the plugs '50. These orifices are sufficiently small that in spite of the high velocity of flow of the dirty liquid, the output does not attain exaggerated values.

The sediment thus projected to the exterior is collected by the fixed peripheral collector 57 formed in the frame from whence a circular trough 58 receives them (Fig. 1).

At the same time the six rods 34 are given arotary movement about their axes, which movement is imparted thereto by the central shaft 2 by means of the train of reducing gears 42, 43, 45, 46 which gives them a Under the influence of the movement ofrotation of each of the rods 34, each bladev48 on the extremity is given a movement of rotation being driven b the square portion 47 thereof and guidedv y the centerm pin 54 engaging the orifice 53. Since each lade is free to slide in its square recess 46 in the direction of its axis, the centrifugal force exerted on each blade presses it against the inner face 49 of plug 50 and at each revolution of said blade it passes over the orifice of channel 55 for cleaning and preventing its obstruction.

The movement of rotation of rods 34 about their axis ma be obtained by other means if desired eit er being derived from the main arbor of the decanting apparatus or from an independent motor.

While I have described what I deem to be the preferable form of my device I do not wish to be limited thereto since there might be changes made in the construction and arran 'ement of parts without departing from the spirit of my invention as comprehended'within the scope of the appended claims.

Having described my invention what I 1. The combination of a decanting apparatus of the continuous rotary type having a plurality of tapered juxtaposed chambers and an orifice formed in the apex of each of said chambers for evacuating dirty liquid, a revolvable blade for each of said orifices eccentrically mounted with respect thereto, each of said blades being adapted to bear against the inner end of its respective orifice through the action of centrifugal force when revolved and means for rotating each of said blades to Wipe its respective orifice during revolving thereof for cleaning and preventing obstruction of said orifices by sediment.

2. The combination of a decanting apparatus of the continuous rotary type havmg a plurality of tapered juxtaposed chambers, an orifice formed in the apex of each of said chambers for evacuating dirty liquid and a main driving arbor, a revolvable blade for each of said orifices adapted to be actuated by said main arbor, said blades bein eccentrically mounted with respect to their respective orifices and adapted to bear against the inner end of their respective orifices through the action of centrifugal force when revolved and means actuated by said main driving arbor for rotating each of said revolving thereof for cleaning and preventing obstruction of said orifices by sediment.

3. The combination of a decanting apparatus of the continuous rotary type having said pinions and blades to wipe its respective orifice during a plurality of tapered juxtaposed chambers, an orifice formed in the apex of each of said chambers for evacuating dirty liquid and a main driving arbor, a revolvable blade for each of said orifices adapted to be actuated by said main arbor, said blades being eccentrically mounted with respect to their respective orifices and adapted to bear against the inner end of their respective orifices through the action of centrifugal force when revolved and means independent of said main driving arbor for rotating each of said blades to wipe its respective orifice during revolving thereof for cleaning and preventing obstruction of said orifices by sediment.

4. The combination of a decanting apparatus of the continuous rotary type having a plurality of tapered juxtaposed chambers, an orifice formed in the apex of each of said chambers for evacuating dirty liquid and a main driving arbor, a radially disposed rod in each of said chambers, a blade feathered to each of said rods adapted to pass over the orifice corresponding thereto for cleaning and preventing obstruction of said orifices by sediment, a bevelled actuating pinion for each of said rods, a bevelled gear common to a train of reduction gears interconnecting said common bevelled gear and said main driving arbor.

In testimony whereof I have afiixed my signature.

CHARLES VICTOR BOUILLON. 

